Fourteen applicants for a city of Providence, Rhode Island, police academy training class each received from the city a letter stating that it was a "conditional offer of employment" subject to successful completion of medical and psychological exams. The 14 applicants passed the medical and psychological exams. However, these applicants were replaced by others after the city changed the selection criteria. Can you identify an offer and acceptance in this case? Can you make out a bilateral or unilateral contract? Why or why not? Provide a rationale or explain how you came to this conclusion.

Fourteen applicants for a city of Providence, Rhode Island, police academy training class each received from the city a letter stating that it was a "conditional offer of employment" subject to successful completion of medical and psychological exams. The 14 applicants passed the medical and psychological exams. However, these applicants were replaced by others after the city changed the selection criteria. Can you identify an offer and acceptance in this case? Can you make out a bilateral or unilateral contract? Why or why not? Provide a rationale or explain how you came to this conclusion.